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Avoid infinite loop if pathname is longer than the maximum the kernel 

is willing to return from getcwd().
(this can only happen in -current).
This commit is contained in:
sommerfeld 1999-07-11 18:01:46 +00:00
parent a9cb7eabb2
commit 508d2d0e9e
1 changed files with 4 additions and 2 deletions
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6
lib/libc/gen/getcwd.c
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@ -1,4 +1,4 @@
/* $NetBSD: getcwd.c,v 1.19 1999/06/11 15:38:40 christos Exp $ */
/* $NetBSD: getcwd.c,v 1.20 1999/07/11 18:01:46 sommerfeld Exp $ */
/*
* Copyright (c) 1989, 1991, 1993, 1995
@ -41,7 +41,7 @@
#if 0
static char sccsid[] = "@(#)getcwd.c 8.5 (Berkeley) 2/7/95";
#else
__RCSID("$NetBSD: getcwd.c,v 1.19 1999/06/11 15:38:40 christos Exp $");
__RCSID("$NetBSD: getcwd.c,v 1.20 1999/07/11 18:01:46 sommerfeld Exp $");
#endif
#endif /* LIBC_SCCS and not lint */
@ -412,6 +412,8 @@ getcwd(pt, size)
for (;;) {
len = __getcwd(pt, bufsize);
if ((len < 0) && (size == 0) && (errno == ERANGE)) {
if (ptsize > (MAXPATHLEN*4))
return NULL;
if ((pt = realloc(pt, ptsize *= 2)) == NULL)
return NULL;
bufsize = ptsize;